noun (n)

• something that bulges out or is protuberant or projects from its surroundings(noun.shape)

  Example:
  The bony excrescence between its horns.
  

  Synonym:
  bulge, bump, extrusion, gibbosity, gibbousness, hump, jut, prominence, protrusion, protuberance, swelling
  

  source: wordnet30
• (pathology) an abnormal outgrowth or enlargement of some part of the body(noun.body)

  source: wordnet30
• An excrescent appendage, as, a wart or tumor; anything growing out unnaturally from anything else; a preternatural or morbid development; hence, a troublesome superfluity; an incumbrance; as, an excrescence on the body, or on a plant.(noun)

  source: webster1913